Answer:
23.246 metres per second
Explanation:
divide the speed value by 2.237
The process which involves plants to cause weathering to a seed that falls into a crack in a rock therefore, breaking apart the rock is called Mechanical weathering.
<h3>
Mechanical weathering</h3>
This is defined as the set of weathering processes that break apart rocks into particles (sediment) through physical processes. The most common form of mechanical weathering is the freeze-thaw cycle. Water seeps into holes and cracks in rocks then the water freezes and expands, therefore making the holes larger eventually making the rock split apart.
Read more on Mechanical weathering:
brainly.com/question/857495
Answer:
A. Longer wavelengths and less dangers
Explanation:
Radio waves are at the lowest end of the EM spectrum, they have the longest wavelength of any other EM waves, the lowest energy and, accordingly, the lowest frequency;
Their low energy and frequency means they pose little risk of harm or danger as they don't get absorbed by human being.
Answer:
The maximum speed is 23.39m/s
Explanation:
Centripetal force Fc is the force acting on a body moving in a circular path and directed towards the centre of the path.
If F = ma
centripetal acceleration a = v²/r
Centripetal force Fc = mv²/r ... (1)
where;
m is the mass of the object
r is the radius.
Since there is friction between the tyre and the road, then the frictional force Ff acts between the surface and this frictional force is the one that tends to oppose the moving force (centripetal force)
Ff = μsR where
μs is the coefficient of static friction
R is the normal reaction which is also equivalent to the weight of the car i.e R = W = mg
Ff = μsmg ... (2)
For the body to be static, the centripetal force must be equal to the frictional force i.e Fc = Ff
mv²/r = μsmg
Making v the subject of the formula;
v²/r = μsg
v² = μsgr
v = √μsgr
Given the following data;
μs = 0.6
g = 9.81m/s²
r = 93.0m
v = √0.6×9.81×93
v = √547.398
v = 23.39m/s
